Don’t get stuck with a dead battery or a dead mobile phone. The Schumacher Electric 400 Peak Amp 12-Volt Lithium Jump Starter and Portable Power Pack (SL1338) is a multi-purpose tool engineered to respond to a range of emergencies. As a jump starter, the SL1338 features 400 peak Amps, which is strong enough to jump start 4-cylinder engines. The internal lithium battery stores enough power for up to 15 jump starts on a single charge. Sold with safe smart clAmps and cable, the unit protects against reverse polarity, short circuit, low Voltage, high temperature, and reverse charging, preventing damage to the battery and charger. The unit also functions as a powerful portable power pack. Quickly charge USB devices such as smartphones or tablets from the 2.4-Amp USB Port. Other features include a a four-LED battery level indicator, a power On/Off button, and a built-in, three-mode LED light.